Why am I thrown out of netflix?

My friend has a netflix account and he gave me his so I have netflix haben.Nach good 4 days I'm thrown from netflix and I have to log in again. Can tell me if this is normal?

Yes, if he has changed the password.

If he changes the PW you will fly out… But if he only has the standard rate, not the one for 12 euro a month, then only one can look at the same time.